Prohexadione calcium enhances rice growth and tillering under NaCl stress

PeerJ

article

Rongjun Zhang¹  Dianfeng Zheng¹  Naijie Feng¹  Quan-Sheng Qiu¹  Hang Zhou¹  Meiling Liu¹  Yao Li¹  Fengyan Meng¹  XiXin Huang¹  Anqi Huang¹  Yixiang Li¹ 

[1] Guangdong Ocean University, College of Coastal Agricultural Sciences;South China, National Saline-tolerant Rice Technology Innovation Center;Shenzhen Institute of Guangdong Ocean University;School of Life Sciences, Lanzhou University, MOE Key Laboratory of Cell Activities and Stress Adaptations

关键词: Rice (Oryza sativa L.);    NaCl stress;    Pro-Ca;    Tillering stage;    Photosynthetic capacity;   

DOI  :  10.7717/peerj.14804

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Salt stress affects crop quality and reduces crop yields, and growth regulators enhance salt tolerance of crop plants. In this report, we examined the effects of prohexadione-calcium (Pro-Ca) on improving rice (Oryza sativa L.) growth and tillering under salt stress. We found that NaCl stress inhibited the growth of two rice varieties and increased malondialdehyde (MDA) levels, electrolyte leakage, and the activities of the antioxidant enzymes. Foliar application of Pro-Ca reduced seedling height and increased stem base width and lodging resistance of rice. Further analyses showed that Pro-Ca application reduced MDA content, electrolyte leakage, and membrane damage in rice leaves under NaCl stress. Pro-Ca enhanced the net photosynthetic rate (Pn), stomatal conductance (Gs), and intercellular CO2 concentration (Ci) of rice seedlings, while increasing the activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and ascorbic acid peroxidase (APX) at the tillering stage under salt stress. Overall, Pro-Ca improves salt tolerance of rice seedlings at the tillering stage by enhancing lodging resistance, reducing membrane damages, and enhancing photosynthesis and antioxidant capacities of rice seedlings.

【 授权许可】

CC BY